.\"	$OpenBSD: loadfirmware.9,v 1.3 2007/05/31 19:20:00 jmc Exp $
.\"
.\" Copyright (c) 2004 Theo de Raadt
.\" All rights reserved.
.\"
.\" Permission to use, copy, modify, and distribute this software for any
.\" purpose with or without fee is hereby granted, provided that the above
.\" copyright notice and this permission notice appear in all copies.
.\"
.\" THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
.\" WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
.\" MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
.\" ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
.\" WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
.\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
.\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
.\"
.Dd $Mdocdate: May 31 2007 $
.Dt LOADFIRMWARE 9
.Os
.Sh NAME
.Nm loadfirmware
.Nd load a firmware file from the filesystem
.Sh SYNOPSIS
.Fd #include <sys/device.h>
.Ft int
.Fn loadfirmware "const char *filename" "u_char **buf" "size_t *buflen"
.Sh DESCRIPTION
The
.Fn loadfirmware
function loads a firmware from the file specified by
.Ar filename
in the directory
.Pa /etc/firmware .
Memory for the firmware is allocated using
.Xr malloc 9
with type
.Va M_DEVBUF
as need be, within a reasonable size limit.
.Pp
If no longer needed, the firmware buffer
.Va buf
can be freed using
.Xr free 9
with type
.Va M_DEVBUF .
.Sh RETURN VALUES
If successful,
.Ar buf
is set to point to the allocation and
.Ar buflen
is set to the size of the firmware.
Then
.Fn loadfirmware
returns 0.
Otherwise, it returns an
.Va errno
style error.